This is a list of communication protocols used for the automation of processes (industrial or otherwise), such as for building automation,

power-system automation Power-system automation is the act of automatically controlling the power system via instrumentation and control devices. Electrical substation, Substation automation refers to using data from Intelligent electronic devices (IED), control and autom ...

, automatic meter reading, and vehicular automation.

Process automation protocols

* AS-i – Actuator-sensor interface, a low level 2-wire bus establishing power and communications to basic digital and analog devices * BSAP – Bristol Standard Asynchronous Protocol, developed by Bristol Babcock Inc. * CC-Link Industrial Networks – Supported by the CLPA * CIP (Common Industrial Protocol) – can be treated as application layer common to DeviceNet, CompoNet, ControlNet and EtherNet/IP * ControlNet – an implementation of CIP, originally by

Allen-Bradley Allen-Bradley is the brand-name of a line of factory automation equipment, today owned by Rockwell Automation. The company, with revenues of approximately US $6.4 billion in 2013, manufactures programmable logic controllers ( PLC), human-mach ...

* DeviceNet – an implementation of CIP, originally by

* DF-1 - used by

ControlLogix, CompactLogix, PLC-5, SLC-500, and MicroLogix class devices * DNP3 - a protocol used to communicate by industrial control and utility SCADA systems * DirectNet – Koyo / Automation Direct proprietary, yet documented PLC interface * EtherCAT * Ethernet Global Data (EGD) – GE Fanuc PLCs (see also SRTP) * EtherNet/IP – IP stands for "Industrial Protocol". An implementation of CIP, originally created by Rockwell Automation *

Ethernet Powerlink Ethernet Powerlink is a real-time protocol for standard Ethernet. It is an open protocol managed by the Ethernet POWERLINK Standardization Group (EPSG). It was introduced by Austrian automation company B&R in 2001. This protocol has nothing to ...

– an open protocol managed by the Ethernet POWERLINK Standardization Group (EPSG). * FINS, Omron's protocol for communication over several networks, including ethernet. *

FOUNDATION fieldbus Foundation Fieldbus (styled Fieldbus) is an all- digital, serial, two-way communications system that serves as the base-level network in a plant or factory automation environment. It is an open architecture, developed and administered by FieldComm ...

– H1 & HSE *

HART Protocol The HART Communication Protocol (Highway Addressable Remote Transducer) is a hybrid analog+digital industrial automation open protocol. Its most notable advantage is that it can communicate over legacy 4–20 mA analog instrumentation current loops ...

HostLink Protocol HostLink is communication protocol for use with or between PLC's made by Omron. It is an ASCII-based protocol generally used for communication over RS-232 or RS-422. The protocol enables communication between various pieces of equipment in an indus ...

, Omron's protocol for communication over serial links. * Interbus, Phoenix Contact's protocol for communication over serial links, now part of PROFINET IO * MECHATROLINK – open protocol originally developed by Yaskawa, supported by the MMA *

MelsecNet MelsecNet is a protocol developed and supported by Mitsubishi Electric for data delivery. MelsecNet supports 239 networks. MelsecNet protocol has two variants. MELSECNET/H and its predecessor MELSECNET/10 use high speed and redundant functionali ...

, and MelsecNet II, /B, and /H, supported by

Mitsubishi Electric , established on 15 January 1921, is a Japanese multinational electronics and electrical equipment manufacturing company headquartered in Tokyo, Japan. It is one of the core companies of Mitsubishi. The products from MELCO include elevators an ...

. *

Modbus PEMEX Modbus is a data communications protocol originally published by Modicon (now Schneider Electric) in 1979 for use with its programmable logic controllers (PLCs). Modbus has become a ''de facto'' standard communication protocol and is now a commo ...

Modbus Plus Modbus is a data communications protocol originally published by Modicon (now Schneider Electric) in 1979 for use with its programmable logic controllers (PLCs). Modbus has become a ''de facto'' standard communication protocol and is now a commo ...

* Modbus RTU or ASCII or TCP * OSGP – The Open Smart Grid Protocol, a widely use protocol for smart grid devices built on ISO/IEC 14908.1 * OpenADR – Open Automated Demand Response; protocol to manage electricity consuming/controlling devices *

Optomux Optomuxhttps://documents.opto22.com/1572_Optomux_Protocol_Guide.pdf is a serial (RS-422/RS485) network protocol originally developed by Opto 22 in 1982 which is used for industrial automation applications. Optomux is an ASCII protocol consisting of ...

– Serial ( RS-422/485) network protocol originally developed by Opto 22 in 1982. The protocol was openly documented and over time used for industrial automation applications. * PieP – An Open Fieldbus Protocol * Profibus – by PROFIBUS & PROFINET International (PI) * PROFINET - by PROFIBUS & PROFINET International (PI) *

RAPIEnet RAPIEnet (Real-time Automation Protocols for Industrial Ethernet) is Korea's first Ethernet international standard for real-time data transmission. *An Ethernet-based industrial networking protocol developed in-house by LSIS guarantees real-tim ...

– Real-time Automation Protocols for Industrial Ethernet * Honeywell SDS – Smart Distributed System – Originally developed by Honeywell. Currently supported by Holjeron. *

SERCOS III Sercos III is the third generation of the Sercos interface, a standardized open digital interface for the communication between industrial controls, motion devices, input/output devices (I/O), and Ethernet nodes, such as PCs. Sercos III applies ...

, Ethernet-based version of SERCOS real-time interface standard *

SERCOS interface In the field of Industrial Control Systems, the interfacing of various control components must provide means to coordinate the signals and commands sent between control modules. While tight coordination is desirable for discrete inputs and outpu ...

, Open Protocol for hard real-time control of motion and I/O * GE SRTP – GE Fanuc PLCs *

Sinec H1 Sinec H1 is an Industrial Ethernet communications protocol that provides the transport layer function widely used in automation and process control applications. The protocol was developed by Siemens and is used mainly for control applications. ...

–

Siemens Siemens AG ( ) is a German multinational conglomerate corporation and the largest industrial manufacturing company in Europe headquartered in Munich with branch offices abroad. The principal divisions of the corporation are ''Industry'', '' ...

SynqNet SynqNet is an industrial automation network launched in 2001 by Danaher Corporation for meeting the performance and safety requirements of machine control applications. Synqnet is built over Ethernet link and 100BASE-TX In computer networkin ...

– Danaher * TTEthernet – TTTech *

MPI MPI or Mpi may refer to: Science and technology Biology and medicine * Magnetic particle imaging, an emerging non-invasive tomographic technique * Myocardial perfusion imaging, a nuclear medicine procedure that illustrates the function of the hear ...

–

Multi Point Interface The Multi-Point Interface – Siemens (MPI) is a proprietary interface of the programmable logic controller SIMATIC S7 of the company Siemens. It is used for connecting the stations programming (PC or personal computer), operator consoles, and oth ...

Industrial control system protocols

* MTConnect *

Open Platform Communications Open Platform Communications (OPC) is a series of standards and specifications for industrial telecommunication. They are based on Object Linking and Embedding (OLE) for process control. An industrial automation task force developed the original ...

, formerly OLE for process control *

OPC Unified Architecture OPC Unified Architecture (OPC UA) is a cross-platform, open-source, IEC62541 standard for data exchange from sensors to cloud applications developed by the OPC Foundation. Distinguishing characteristics are: * Standardized data models freely a ...

* Data Distribution Service from the Object Management Group

Building automation protocols

1-Wire 1-Wire is a device communications bus system designed by Dallas Semiconductor Corp. that provides low-speed (16.3 kbit/s) data, signaling, and power over a single conductor. 1-Wire is similar in concept to I²C, but with lower data rates and ...

– from Dallas/Maxim * BACnet – for Building Automation and Control networks, maintained by ASHRAE Committee SSPC 135. *

BatiBUS BatiBus was a network protocol for building automation that was introduced in 1989 and has since been succeeded by KNX. It was a relatively simple low-cost protocol that did not rely on dedicated chips. The system was run by the BatiBus Club Intern ...

- merged to KNX * C-Bus Clipsal Integrated Systems Main Proprietary Protocol * CC-Link Industrial Networks, supported by

DALI Dali or Dalí may refer to: Chinese history * Kingdom of Dali (937–1253 AD), centered in modern Yunnan * Kingdom of Nanzhao or Dali, Kingdom of Dali's predecessor state * Dali, Emperor Daizong of Tang's third and last regnal period (766–779) ...

- Digital Addressable Lighting Interface specified in IEC 62386. * DSI - Digital Serial Interface for the controlling of lighting in building, precursor to DALI. * Dynet - lighting and automation control protocol developed in Sydney, Australia by the company Dynalite *

EnOcean The EnOcean technology is an energy harvesting wireless technology used primarily in building automation systems, but also in other application fields such as industry, transportation, logistics or smart homes solutions. The energy harvesting wire ...

– Low Power Wireless protocol for energy harvesting and very lower power devices. *

European Home Systems Protocol European Home Systems (EHS) Protocol was a communication protocol aimed at home appliances control and communication using power line communication (PLC), developed by the European Home Systems Association (EHSA). After merging with two other proto ...

(EHS) - merged to KNX *

European Installation Bus Instabus, is a decentralized open system to manage and control electrical devices within a facility. It is developed by Berker, Gira, Jung, Merten and Siemens AG. There are about 200 companies of electrical supplies using this communication protoco ...

(EIB) named also

Instabus Instabus, is a decentralized open system to manage and control electrical devices within a facility. It is developed by Berker, Gira, Jung, Merten and Siemens AG. There are about 200 companies of electrical supplies using this communication protoco ...

- merged to KNX * INSTEON - SmartHome Labs Pro New 2-way Protocol based on Power-BUS. *

KNX KNX is an open standard (see EN 50090, ISO/IEC 14543) for commercial and domestic building automation. KNX devices can manage lighting, blinds and shutters, HVAC, security systems, energy management, audio video, white goods, displays, remote ...

– Standard for building control. Previously Batibus/EHS/EIB * LonTalk – protocol for LonWorks technology by Echelon Corporation * Modbus RTU or ASCII or TCP * oBIX - Open Building Information Exchange is a standard for RESTful Web Services-based interfaces to building control systems developed by

OASIS In ecology, an oasis (; ) is a fertile area of a desert or semi-desert environment'ksar''with its surrounding feeding source, the palm grove, within a relational and circulatory nomadic system.” The location of oases has been of critical imp ...

. * UPB - 2-way Peer to Peer Protocol *

VSCP The Very Simple Control Protocol (VSCP) is a free automation protocol suitable for all sorts of automation task where Building automation, building- or Home automation, home-automation is in the main focus. Its main advantage is that each VSCP- ...

- Very Simple Control Protocol is a free protocol with main focus on building- or home-automation * xAP – Open protocol * X10 – Open standard for communication among electronic devices used for home automation (domotics) * Z-Wave - Wireless RF Protocol * ZigBee – Open protocol for Mesh Networks

Power system automation protocols

* DNP3 – Distributed Network Protocol * IEC 60870-5 * IEC 61850 * IEC 62351 – Security for IEC 60870, 61850, DNP3 & ICCP protocols

Automatic meter reading protocols

ANSI C12.18 A smart meter is an electronic device that records information such as consumption of electric energy, voltage levels, current, and power factor. Smart meters communicate the information to the consumer for greater clarity of consumption be ...

* DLMS/IEC 62056 *

IEC 61107 A smart meter is an electronic device that records information such as consumption of electric energy, voltage levels, current, and power factor. Smart meters communicate the information to the consumer for greater clarity of consumption beha ...

* M-Bus * OMS *

ZigBee Smart Energy 2.0 Zigbee is an IEEE 802.15.4-based specification for a suite of high-level communication protocols used to create personal area networks with small, low-power digital radios, such as for home automation, medical device data collection, and othe ...

* Modbus *

ANSI C12.21 A smart meter is an electronic device that records information such as consumption of electric energy, voltage levels, current, and power factor. Smart meters communicate the information to the consumer for greater clarity of consumption beha ...

ANSI C12.22 ANSI C12.22 is the American National Standard for Protocol Specification for Interfacing to Data Communication Networks ANSI C12.22/IEEE Std 1703 describe a protocol for transporting ANSI C12.19 table data over networks, for the purpose of interop ...

Automobile / Vehicle protocol buses

* Controller Area Network (CAN) – an inexpensive low-speed serial bus for interconnecting automotive components * FlexRay – a general purpose high-speed protocol with safety-critical features *

IDB-1394 IEEE 1394 is an interface standard for a serial bus for high-speed communications and isochronous real-time data transfer. It was developed in the late 1980s and early 1990s by Apple in cooperation with a number of companies, primarily Sony an ...

* IEBus * J1708 – RS-485 based SAE specification used in commercial vehicles, agriculture, and heavy equipment. * J1939 and ISO11783 – an adaptation of CAN for agricultural and commercial vehicles * Keyword Protocol 2000 (KWP2000) – a protocol for automotive diagnostic devices (runs either on a serial line or over CAN) * Local Interconnect Network (LIN) – a very low cost in-vehicle sub-network * Media Oriented Systems Transport (MOST) – a high-speed multimedia interface *

Vehicle Area Network The Vehicle Area Network (VAN) is a vehicle bus developed by PSA Peugeot Citroën and Renault. It is a serial protocol capable of speeds up to 125 kbit/s and is standardised in ISO 11519-3. At the media layer, VAN is a differential bus with domin ...

(VAN) *

UAVCAN Cyphal is a lightweight protocol designed for reliable intra-vehicle communications using various communications transports, originally destined for CAN bus, but targeting various network types in subsequent revisions. OpenCyphal is an open-sourc ...

- a lightweight protocol for in-vehicle communication over CAN or Ethernet

References

{{List of Automation Protocols Industrial Ethernet Control engineering automation